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Re: [PATCH] ppc64 utmp changes
- From: Andreas Jaeger <aj at suse dot de>
- To: "Steve Munroe" <sjmunroe at us dot ibm dot com>
- Cc: Jakub Jelinek <jakub at redhat dot com>, libc-alpha at sources dot redhat dot com
- Date: Tue, 01 Oct 2002 06:42:29 +0200
- Subject: Re: [PATCH] ppc64 utmp changes
- References: <OFD99ACFE1.E6EB60D1-ON86256C44.0076231C@rchland.ibm.com>
"Steve Munroe" <firstname.lastname@example.org> writes:
> Jakub Jelinek write:
>> Now an important question is whether we want to do something similar
>> on x86-64, s390/s390x and sparc/sparc64.
>> Because when both 32-bit and 64-bit programs will use utmp/utmpx,
>> the files will contain garbage.
> Yes that is an important question!
> I still don't understand by this (and other BIARCH stuff) is not a concern
> for the more mature BIARCH systems (s390, x86_64, sparc, ...). But I can
> find no evidence of this in the sysdeps source for those platforms ...
> For powerpc64 we assume that most of the system utilities (the utilities
> that write /var/run/utmp for example) will remain 32-bit. So for us making
> 64-bit backward compatible to 32-bit utmp is the best answer. What are s390
> and x86_64 assuming?
s390x and x86-64 both have full 64-bit userland with compatibility for
32-bit userland. Or in other words: Basically both are prime
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